[OVN] Since "service type" for OVN routers feature, previously created routers cannot be deleted

[Rodolfo Alonso]

Since [1], any new OVN router has a service provider configuration. This is something not present in OVN routers created before this functionality.

When we try to delete a "old" OVN router, this is the exception received: [3].

The associated ``ProviderResourceAssociation`` register in missing for those OVN routers created before this feature.

[1]https://review.opendev.org/c/openstack/neutron/+/883988
[2]https://review.opendev.org/c/openstack/neutron/+/883988/83/neutron/services/ovn_l3/service_providers/driver_controller.py#42
[3]https://paste.opendev.org/show/bXHekK7yKUj7fbvma6Bf/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/908986

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron/+/908986
Committed: https://opendev.org/openstack/neutron/commit/d755c2551ff55696174554cb730e79903c922971
Submitter: "Zuul (22348)"
Branch: master

commit d755c2551ff55696174554cb730e79903c922971
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Tue Feb 13 22:28:25 2024 +0000

    [OVN] Add ``ProviderResourceAssociation`` to any ML2/OVN router

    Since [1], any Neutron router created with ML2/OVN will have an
    associated ``ProviderResourceAssociation`` register. The routers
    created before this feature won't have any and it won't be possible
    to delete them. This patch adds a temporary maintenance task to
    create the needed register for these Neutron routers.

    [1]https://review.opendev.org/c/openstack/neutron/+/883988

    Closes-Bug: #2053122
    Related-Bug: #2020823
    Change-Id: Iecd5c7a66b16e25e9888dbd1e305586b2be2011e

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron 24.0.0.0rc1 release candidate.